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H. VAN HOBVBNBERGH. CHEMICAL PRINTING TELEGRAPH.

(NoModeI.)

No. f1',

UNITED STATES PATENT AErica@ HENRY vAN HOEVENEEEGH, OE ELIZABETH, NEW JERSEY, AssIeNOE 'ro vTHE BALTIMORE a OHIO TELEGEAPH COMPANY, OE BALTIMORE, Mn.

CHEMICAL PRINTINGeTELEGAPH. f

SPECIFICATION lforming part of Letters Patent No. 3 16, 689,`dated April 28. 1885. Application filed August 7, 1884. (i\'o model.)

To @ZZ whom, it may concern: fecting astep-bystep movementof the wheels. 'l Beit known that l, HENRY VAN HoEvEN- The type are faced with platinum, iridiuin, or BERGH, acitizen of the United States, residing with other suitable metal which will not bein Elizabeth,lin the countyof Union and State come greatly corroded by the action ofelec- 5 of New Jersey, have invented certain new and tric currents. Suitable means are employed 55 useful Improvements in Chemical Printing for feeding a chemically-'prepared paper to Telcgraphs, of which the following is a specithe type-wheels and causing the-'same to be cat'ion. impelled toward the type-wheels when it is My invention relates both to the class off indesired to effect impressions therefrom. The

struments employed for printing characters type-wheels are insulatedfrom each other, and 6o from type-wheels capable of being `advanced they are respectively provided with conduetl by a step-by-step-movement, and to the class iug-platens,which are also insulated from each 'telegraphic apparatus employed for effectother. One of the typeewheels and the platen ing upon chemically-prepared paper a record of the remaining type-wheel are electrically i of a telegraphic dispatch through the action connected with the mainline leading to the 65 of electric'currents. instrument. The second `type-wheel and the Numerous methods have been devised for platen ofthe first-named type-wheel are in imparting to the type-wheels of telegraphic relike manner connected with the conductor ceiving-instruments astep-bystep motion,and leading from the instrument. Two shunt'- for effecting impressions therefrom through circuits will therefore be formed around the 7o the agency of a printi11g-platen,which is actu-v instrument when the platens are pressed ated when the desired type has been brought against their respective ,type-wheels, the one into position to print. There have also been circuit 'passing from the main line through devised various methods of recording. telethe i first type-wheel to its platen, and 'the graphic messages upon chemically-prepared. second from the main line througlrthe sec-v 75 paper throughtheagencyofarecording-stylus ond platento its type-wheel. It', therefore, l moving along the surface of the paper. lVhen the platens are impelled toward the typeelectric currents are` transmitted through the wheels, thereby causing the chemically-prepaper in the proper direction, :marks or i1npared paper to rest against the same, an i1npressionswill be formed thereupon by thedispression will be effected upon the paper from 8o colorationof the paper. Currents in the opone or the other type-wheel, accordingly as posite direction, however, do not produce corthe current upon the main line is in one direcresponding discolorations upon the .chemical tion or the other. lhus a positive current ,.paper. This action of electric currents upon passing from the main line through the first 3 5 chemical paper has also been utilized for the type-wheel to its platen will effect an lnipres- 8 5 purpose of effecting impressions or imprints sion of the vcharacter upon that type-wheel frommetallic type representing different charagainst which the chemically-prepared paper aCeTS- i rests. The same current, however, passing Myinvention consistsin combining with any from the remaining platen to its typewheel,

40 suitable means for revolving two type-wheels will be in the Wrong direction to effect an i1nen means for connecting the same in an electric pression from the second type-wheel. When, circuit in such'a man ner that electric currents however, the current transmitted overthe line traversing the main line in one direction will is reversed, it will be in the proper d1rect1on effect impressions from one of the type-wheels, to eifect an impression from the second type- While electric currents traversing the mainv Wheel, but not frornthe first. 4The reason ter 95 line. in theV opposme'diiection .will effect imthis result will be evident vwhen '1t 1s considpressionsfrom the other typewheel f ered that a negative current passing from the In carrying; out my invention I prefer to platen of the second type-wheel to the typemount both type-wheels 'rigidly upon a typewheel itself is in effect apositive current passi Wheelhaftrwviddrithsritehleme-ans ing eentherapeutennto its platea Vrfi-.10e

p a front elevation'of such parts lof an instru! *T5 ment as are necessary to illustrate the invention.Il Fig.' 2 is a sidecelevation of the same,

'and ,Fig. 3 is a detail view showing both the,

1 outlets of. the reservoir.

Referring vto the drawings, Arepresents the zo'type-Wheel shaft, upon which are rigidly mounted two type-wheels, B and Bz. The type-wheels B and Bare insulated from each 4other aswell as fromthe shaft upon which 1 they are carried; but they are provided with 25 two contact-surfaces, b and b2, respectively, against which vrest contact-.brushes cand c,

' foreii'ecting electrical connections therewith,

in a manner hereinafter described. The typewheels are revolved by means of a suitable es- 30 capement-anchor, D, acting upon a scapewheel, E, and controlled by an electro-magnet,'F, in a'manner well'. understood. The electro-magnet F is v'italized either by means of alternating electric impulses or by succes- 35 sive impulses of one polarity, as maybe desired. Preferably, however, the latter construction is employed, so that to effect an ad vancement of the type-wl1eel lit is necessarymerely to transmit lsuccessive impulses of 4.! either positive or negative polarity over the main line.' The main-line connections are con tinued from the electro-magnet E through the printing-magnet G, which is'adapted to r'espond onlyto vprolonged impulses of either 4 5 character, or else to an increase in the strength of an impulse, Whether positive or negative'. Upon the armatureleverg of the electro-magnet G is carrieda paper guide and support,

g", andtwo printing plat'ens or electrodes, h 5o audh, which are respectively applied tothe type-wheels B and B2. The electrodes h and .11? are insulatedfrom each other, as shown, and they'are constructed of brass or of other suitable conducting material which is not lia-- vtype-wheel A conductor, 3, leadsfrom If, however, the type devwheel B2.

,the brush ci, applied to the type-wheel B, to

the conductor L', 'leading fromthe instrument to the earth, and a conducto1:,4, leads from 7 0 'the remaining printing-electrode h to the same point in the conductor L. vItwill be seen, therefore, that when the vprintingfelectrodes jrest againstv their type-wheels there will be formed two shunt-circuits around the electro- 7 5 magnets of the instrument. The impulsesr traversing one of these shunt-circuits will p ass A from the main line th rough the type-Wheel B to the platen h, while those traversing the other will pass from theplaten'h2 to the type- 80 If, -therefore, the current upon the main line be positive, it will chemically record upoxrthe paper tape P, which is caused to 'intervene betweenthe typefwheels andthe plat? ens, an impression of the type upon the Wheel' BA against which it rests. If, however, the

current be'negative, .a record will. be made in. the same'manner of a type upon thewheel B2;

but in either case an impression will be taken from only one type-wheel, 'for the reason that 9o the current-will not act to effect impressions when in the opposite direction. In operatingv the'instrulnent, therefore, it is necessaryonly to bring the typefwheels into position, so that the desired character is above the paper, and

to then 4actuate the printing-lever by means of a current of positive or of negative'polarity, accordingly as it is desired to print from the It vwill .be understood that only a fraction of 10o the current traversing the main line'will be y required foreiiecting a record of the type upon the chemically-prepared paper, and for this reason .adjustable artificial resistances r andl r2 may, it' desired, be inserted in, the conducto'rs I and 2, respectively, for tliepurpose of. regulating the proportion of tlie current whic shall'traver'se the shunt-circuit.

In practice' it will be found convenient in printing continuously from one type-Wheel to actuate the escapement device by currents having the polarity required to el'ect immessions froml the 'type-wheel', and when it "is desired to effect impressions from .the other type- Wheel' it is necessary -only'to reverse the connections of the transmitting-battery.

For 'convenience aud economy in applying lthe chemical solutions to the paper, I prefer to employ a reservoir, K, having two outlets or feeding-points, k', and k2, through which the fluid is allowed to escape upon the paper tape j `as it is being supplied #to the printing-instrument. The 'two points thus lie in the proper position to vapply 1in-es of chemicals to the paperas the latter is fed to the type of the re' spective type-wheels Vby means of any suitable paper-feeding device.

In practice any suitable Well-known chemical solutions adapted to be suitably acted upon by currents in one direction, but not by currents in the oppositedirection, may be e1nployed.

I claim as my invention- 1. The combination, substantially as herein# before set forth, with two type-wheels and y `Imeans for revolvingthe same, of two insulated printing platens or electrodes, conductors connecting one of said type-wheels and one of said electrodes with the main line leading to the instrument, conductors connecting the remaining type-wheel and theremaining platen with the main-line conductor leading from i the instrument, andmeans for impellin'g said electrodes toward said type-wheels.

2. The combination, substantial-ly as hereinbefore set forth, with two insulated type-wheels and means for yrevolving the same,of a telegraphic main line, two insulated printing .platens 'or electrodes, and means fortransmitting an electric impulse from one of said type-wheels to its printing-platen and at the same time an impulse from the .remaining of said platens to the corresponding type-wheel.

3. The combination, substantially as hereinl before set forth, with two insulated type-,wheels sulatedprinting-electrodes, means for passing and means for revolving the same, of two ina chemicallyprepared paper beneath said type-wheels and for causing said 'electrodes to press said chemically-prepared paper against said type-wheels, and means, substantially as described, for causing a positive current to pass from either type-wheel to its electrode at will,

thereby causing an imprint to be made upon f said chemically-prepared paper.

same, of two insulated printing-electrodes applied thereto, means for supporting a strip of chemically-prepared paper beneath said typewheels, and means, substantially such as described,for causing an electric'current to pass from one type-Wheel to its electrode or from the other type-wheel to its electrode, thereby causing an impression to be effected from/one or the other of said type-wheels upon said paper accordingly as an .electric current is transmitted over said main line in one direction or the other.

5. The combination, substantially as hereinbefore set forth, with two or more type-wheels and means, substantially such as described,for effecting impressions`therefrom upon chemically-preparedv paper,` of a chemicalsolution reservoir having two outlets, and means, substantially such as described, for causing the paper to pass 'beneath said outlets to said type-wheels.

In testimony whereof I have hereunto subscribed my name this 14th day of April, A. D. 1884:l v

. HENRY VAN HOEVENBERGH, [L s.]f`

Witnesses:

DANL. W. EDGEcoMB, CHARLES A.V TERRY. 

